Ball bearing for the rudder surfaces of aircraft



H. VON FREMERY. BALL BEARING FOR THE RUDDER SURFACES 0F AIRCRAFT.

' APPLICATION FILED IULY 20. 1920.

Patented June 6, 1922.

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BALL BEARING FOR THE RUDDER SURFACES OF AIRCRAFT.

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To all whom it may concern: I

Be it known that T, ITERMANN voN Fnnmnar, a citizen of the Republic Argentina, residing at Schloss Spindlhof, near Regeustauf, Bavaria, Germany, have invented a new and useful Improvement in Ball Bearings for the Ruddeif Surface s of Aircraft (for which I havefiled'apphcations for patent in Germany, No. 293227, Jan. 8, 1915; Austria, No. 79535, Feb. 18, 1916; and Hungary, Feb. 21, 1916), of which the following is a specification.

My invention relates to a ball bearing arrangement for the rudder surfaces of alrcraft. Now it is desirable that these said surfaces shall be always so arranged as to be easily displaceable relatively to the supporting or balancing planes on which they are mounted. This object is attained in accordance with this invention by the interposition of a. ball bearing in the link memher to be arranged intermediate the two planes or surfaces. The practical realization of this object is, however, in so far rendered diflicult, since-firstly, it is desirable that any projection of the bearing structure either upwardly or downwardly beyond the surface of the longitudinal girder be avoided, and secondly, that there be prevented the formation of any considerable distance between the plane and the rudder, and both for the reason of preventing the creation of any additional air resistances to the resistances already produced by the supporting and winding surfaces. The object specified is attained by arranging a slot in the tube surrounding the ball bearlug and serving as the main support for the rudder surface.

An embodiment of my invention is shown in the accompanying drawing, in which:

Fig. 1 shows a cross section through a longitudinal girder and the tube with a view of the bearing therein contained.

Fig. 2 is a top view appertaining thereto.

Fig. 3 is a perspective view of the slotted tube.

Figs. 1- and 5 show the cross plate serving to connect the tube with the outer ball-race, and

Figs. 6 and 7 show respectively a face view and an edge view of the plate serving to connect the inner ball race with the longitudinal girder, and formed to constitute bearing block.

Application filed July 20 Specification of Letters Patent. Patgntgd J 11% 6 1922 192a. seria 'no. aamee. a

The longitudinal girder a/is chamfered at the side facing the tube 6 and this in accordance with the curvature thereof, and supportsa narrow fitting plate 0 surrounding the chamfered face and the level upper andunderside of the longitudinal girder: a, sa d plate being secured in its position by means .of a screw (Z disposed opposite to the chamfere'd portion. To the strip 0' there are autogenously welded the two sheet metal brackets e, and this in amanner to leave an intermediate space which will be slightly larger than the depth of the ball bearing; if preferred, the said brackets e may be replaced by a forked outrigger. These brackets are adapted to conjointly maintain thev ball bearing axis f firmly so as to prevent it from rotating. Intermediate the two brackets 0 there is rigidly mounted on the said axis 7 the innerball race g, to either side of which there may be arranged distance blocks or washers h.

The outer ball race 2' is enclosed in an annular casing 76 which may be slotted at Z and which is then suitably provided close to the joint Z with two ears m. m joined by a screw n. Autogenously welded on to the ring is a sheet metal member 0 having the form of a ring with a sector shaped por tron removed, leaving an opening 72. The said member 0 is autogenously welded for the extent of its circumference together with the tube 6. All the welds are indicated in the drawing by thin curved lines.

lVith the object of providing an ample play. the tube 5 is provided with a rectangular cut or opening q through which the sheet metal brackets extend.

I claim:

1. In an air craft, the main support for the rudder surface having a tube provided with a ball bearing and with an opening, supporting means connecting with the ball bearing and. extending through said opening, and adapted to be secured to an external support.

2. In an air craft, the main support for the rudder surface having a tubular portion provided with a ball bearing supported therein, and with an opening, and supporting means connecting with the ball bearing and extending through said opening and connecting to an external support.

3. In an air craft, the main support for the rudder surface, having a tubular portion provided with an opening, a ball bearing and means for supporting it in said tubular portion, said bearing having an axle, bracket arms connecting with said axle and extending through said opening, and external means for supporting them.

at. In an air craft, the main support for the rudder surface having a tubular portion, a ball bearing therein, a sector shaped member secured in the tube and to the outer case of the bearingto support the same, said tube having an opening, bracket arms secured to the inner ball race of the bearing and extending out through said opening and adapted to be secured to an external support.

5. A ball bearing arrangement for the rudder surfaces of aircraft, comprising a HERMANN VON FREMERY.

Witnesses MIoHAEL STAUoH CHRISTOPH MENNING. 

